Turnover bar

ABSTRACT

A turnover bar is disclosed having a hole engaging end portion. The bar is provided with self-removal mechanism including an external collar movable on the hole engaging portion of the bar. The collar is normally biased by an external spring at least to the end of the hole engaging portion of the bar. The collar is manually depressed against the bias of the spring in service to effect an engagement of the bar with a turnover hole provided in some portion of a drive mechanism. The biasing force of the spring is adequate to lift the bar and effect a removal of the bar from the hole after use lest the bar be forgotten.

United States Patent [191 Phelps [451 Sept. 10, 1974 TURNOVER BAR [56] References Cited UNITED STATES PATENTS 969,798 9/1910 McKee 74/550 X 1,491,724 4/1924 Nash 74/550 2,228,690 l/l94l Crary 294/61 3,326,254 6/1967 Diehl 294/19 R X 3,516,200 6/1970 Marin 294/61 X Primary Examiner-Richard A. Schacher Assistant ExaminerJohnny D. Cherry Attorney, Agent, or Firm--Andrus, Sceales, Starke & Sawall [57] ABSTRACT A turnover bar is disclosed having a hole engaging end portion. The bar is provided with self-removal mechanism including an external collar movable on the hole engaging portion of the bar. The collar is normally biased by an external spring at least to the end of the hole engaging portion of the bar. The collar is manually depressed against the bias of the spring in service to effect an engagement of the bar with a turnover hole provided in some portion of a drive mechanism. The biasing force of the spring is adequate to lift the bar and effect a removal of the bar from the hole after use lest the bar be forgotten.

4 Claims, 4 Drawing Figures PAIENIED SEPI 01914 w A C m II H'II 'IIII V a a s v a ck TURNOVER BAR BACKGROUND FOR THE INVENTION This invention relates generally to a turnover bar and more particularly to such a bar that is self-removing.

When a machine such as a press or the like is shut down for repair, change of tools, or other service, turnover bars are customarily employed to move or turnover the drive mechanism in order to expose that portion of the machine which requires the service. Such a bar is selectively engaged within holes provided therefor in one or more members of the drive mechanism and then manually moved rectilinearly, rotationally or in any other manner as dictated by the member. Such bars are sometimes left in engagement with such holes in contemplation of possible further turnover or for other reasons. Such is a dangerous practice for if the bar is forgotton, the bar may be ejected inertially or centrifugally upon machine start-up and could cause injury or damage. It is generally an object of this invention to provide a self-removing turnover bar which can be effective with virtually any member of a drive mechanism provided with holes for engagement by such a bar.

SUMMARY OF THE INVENTION According to this invention, a turnover bar having a hole engaging end portion is provided with a self removal mechanism. The self-removal mechanism generally includes an external collar movable on the hole engaging portion of the bar. An external spring normally biases the collar at least to the end of the hole engaging portion of the bar. In service the collar is manually depressed against the bias of the spring to effect an engagement of the bar within a turnover hole provided in some member of a drive mechanism. The biasing force of the spring is adequate to lift the bar and effect a removal of the bar from the hole after use lest the bar be forgotten.

DESCRIPTION OF THE DRAWING FIGURES The drawings furnished herewith illustrate the best mode presently contemplated for carrying out the invention and are described hereinafter.

In the drawings:

FIG. 1 is a side elevation of the turnover bar of this invention shown inserted in a hole in the periphery of a flywheel;

FIG. 2 is an enlarged sectional view taken generally on line 22 of FIG. 1;

FIG. 3 is a view generally similar to that of FIG. 2 showing the turnover bar as biased out of the flywheel hole to provide for its self-removal, and

FIG. 4 is a sectional view taken generally on line 4-4 of FIG. 3.

DESCRIPTION OF THE ILLUSTRATED EMBODIMENT Referring to the drawings, the turnover bar 11 of this invention generally comprises a handle portion 12 at one end thereof and a hole engaging end portion 13 at the opposite end thereof. The handle portion 12 of the bar 11 may include a suitable hand grip l4 and pro vides for the manual manipulation of the bar. The bar 11 is selectively engageable within suitable holes 15 provided in some portion of the drive mechanism such as in the periphery of a flywheel l6, of a press or the like for turning over the mechansim after shut-down whereby to open or cxposc dies or other working tools, not shown.

The bar 11 is stepped intermediate the handle por tion 12 and the hole engaging portion 13 to provide a shoulder 17 facing in the direction of the hole engaging portion.

The turnover bar 11 includes mechanism to effect its self-removal from the holes 15 to preclude possible start up of the machine with the bar remaining in a hole. Such self-removal mechanism generally includes a pair of opposed collars l8 and 19 movable relative to each other. The collar 18 abuts on shoulder 17 and is fixed relative to the bar 11 by means of a weld 20 or other suitable bond. The end of the collar 18 adjacent to the shoulder 17 is provided with a radial flange 21 forming a fixed abutment for one end of the coil spring 22 disposed between and externally of the collars.

The opposite end of the coil spring 22 bears against the external radial flange 23 provided on the end of collar l9 farthest removed from shoulder 17. The collar 19 is slidable on the hole engaging portion 13 of bar 11 between a position in engagement with the collar 18 with the spring 22 compressed as generally shown in FIG. 2 and a position representing full extension of the spring as generally shown in FIG. 3. In the position of full spring extension, collar 19 will extend at least to the free end of the hole engaging portion 13 of bar 11 and preferably beyond such free end thereof. Collar 19 may be substantially longer than collar 18 to preclude any possible total disengagement from the free end of the hole engaging portion 13 under the urging of spring 22 and provide for an adequate slide bearing on the bar 11. A weld 24 or other suitable attachment means secures the respective ends of the coil spring 22 to the corresponding flanges 21 and 23 of the collars 18 and 19, respectively, to preclude a disengagement among the elements of the self-removal mechanism.

When it is desired to use the turnover bar 11, the collar 19 is placed against the member provided with holes 15 such as the periphery of a flywheel 16 or the like with the hole engaging portion 13 of the bar aligned with a selected hole. The bar 11 is then manually depressed against the bias of spring 22 to push the hole engaging portion 13 of the bar into the hole 15 as generally indicated by the arrows 25 as shown in FIGS. 1 and 2. As best shown in FIG. 2, the limit of depth of bar engagement into the hole 15 may be established by an abutting contact between the adjacent ends of collars 18 and 19. With the bar 11 manually restrained from coming out of the hole 15, the bar may be simulta neously manually actuated in the manner of a lever to move a given member rotationally, rectilinearly or in whatever manner required for the member. According to FIG. 1, manual actuation to effect rotation of the flywheel 16 or the like is indicated by the arrow 26.

Any turnover bar ought to be removed from a hole 15 immediately after its use lest its removal is forgottem prior to machine start-up which could result in injury or damage upon start-up. The turnover bar 11 is easily lifted from a hole 15 with the bias of spring 22 assisting in such effort. In the event the user of bar 11 neglects to remove the bar from the hole 15, the bar is self-removing when the users hand is removed from the grip 14. It is contemplated that the bias of spring 22 will be adequate to overcome the weight of the bar 11 and thus lift the bar free of the hole as generally indicated by the arrow 27 as shown in FIG. 3. With the full extension of spring 22, the collar 19 should extend at least to the end of the hole engaging portion 13 of bar 11 as generally indicated in FIG. 3.

The turnover bar 11 provided with external selfremoval mechanism can be effective with virtually any member of a machine drive provided with holes 15 for engagement by the bar. When the turnover bar 11 is a solid member as indicated in FIG. 4, the external selfremoval mechanism of this invention can be provided even on bars of relatively small diametral size without impairing the strength of such bars.

Various modes of carrying out the invention are contemplated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention.

1 claim:

1. in a turnover bar having a hole engaging end portion, a collar movable on the hole engaging portion of the bar, and spring means connecting the movable collar to the bar and disposed external to the bar and bearing on said collar to normally bias the collar to a position adjacent to the end of the hole engaging portion of the bar, said collar being depressible against the bias of the spring means to provide for engagement of the bar within a turnover hole, and said spring means having a biasing force adequate to lift the bar and effect a removal of the bar from the turnover hole after use.

2. A self-removal mechanism for use on a turnover bar having a hole engaging end portion. said mechanism comprising a pair of collars adapted for disposal on the hole engaging portion of a turnover bar. and spring means disposed between and connecting said collars, one of said collars being adapted for securement on said bar in spaced relation from the end of the hole engaging portion with the other of said collars remaining movable on said hole engaging portion, said spring means normally biasing the movable collar to a position adjacent to the end of the hole engaging portion of the bar and being depressible to provide for engagement of the bar within a turnover hole, said spring means further having a biasing force adequate to lift the bar and effect a removal of the bar from the hole after use.

3. The invention as set forth in claim 2 wherein the spring means comprises a coil spring for disposition externally of the turnover bar.

4. In a turnover bar having a hole engaging end portion, a first collar secured on said bar in spaced relation from the end of the hole engaging portion, a second collar slidably disposed on the hole engaging portion of said bar, and a coil spring disposed externally of the bar and connecting said collars and normally biasing the slidable collar at least to the end of the hole engaging portion of the bar, said spring being depressible to provide for engagement of the bar within a turnover hole and said spring having a biasing force adequate to lift the bar and effect a removal of the bar from the hole 

1. In a turnover bar having a hole engaging end portion, a collar movable on the hole engaging portion of the bar, and spring means connecting the movable collar to the bar and disposed external to the bar and bearing on said collar to normally bias the collar to a position adjacent to the end of the hole engaging portion of the bar, said collar being depressible against the bias of the spring means to provide for engagement of the bar within a turnover hole, and said spring means having a biasing force adequate to lift the bar and effect a removal of the bar from the turnover hole after use.
 2. A self-removal mechanism for use on a turnover bar having a hole engaging end portion, said mechanism comprising a pair of collars adapted for disposal on the hole engaging portion of a turnover bar, and spring means disposed between and connecting said collars, one of said collars being adapted for securement on said bar in spaced relation from the end of the hole engaging portion with the other of said collars remaining movable on said hole engaging portion, said spring means normally biasing the movable collar to a position adjacent to the end of the hole engaging portion of the bar and being depressible to provide for engagement of the bar within a turnover hole, said spring means further having a biasing force adequate to lift the bar and effect a removal of the bar from the hole after use.
 3. The invention as set forth in claim 2 wherein the spring means comprises a coil spring for disposition externally of the turnover bar.
 4. In a turnover bar having a hole engaging end portion, a first collar secured on said bar in spaced relation from the end of the hole engaging portion, a second collar slidably disposed on the hole engaging portion of said bar, and a coil spring disposed externally of the bar and connecting said collars and normally biasing the slidable collar at least to the end of the hole engaging portion of the bar, said spring being depressible to provide for engagement of the bar within a turnover hole and said spring having a biasing force adequate to lift the bar and effect a removal of the bar from the hole after use. 